>>4108352I didn't post the last 5-6 images, so I can't speak for their posters. But stuff like this depend on your ISP policy and how they operate which also depends on your country.
In my case, my IP address changes every time my router restarts, which can be for the slightest reason like moving a cable or something. I had instability earlier this month and so every time I posted it counted as a new one, things are better now though and happen less frequently.
Also, the couple of times I posted from phone (not in this thread) I noticed the IP count didn't go up. Probably because 4chan counts the IP of your router/modem not of your device. Haven't tested it enough though to make sure.
